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www.blaubergventilatoren.de
KOMFORT EC LB/LBE S11
Fig. 1. Unit design and operating logic
DESIGN
The casing is made of double-skinned aluzinc panels, internally filled
with mineral wool layer 25 mm for heat- and sound-insulation. The casing is
equipped with fixing brackets with vibration absorbing connectors for easy
installation. The hinged casing panel ensures easy access to the internals for
cleaning and other maintenance operations.
The spigots for connection to the air ducts are located at the side of the
unit and are rubber sealed for airtight connection to the air ducts. The unit is
fitted with a bypass damper which is opened automatically in summer time
to cool down a room with cool outside air. For the model with a heater the
bypass damper is also used for the heat exchanger freezing protection. The
service access is on the side panel which can be installed on the left, seen on
the supply air flow direction.
The unit is equipped with high-efficient external rotor EC motors and
centrifugal impellers.
The forward curved blades in KOMFORT EC LB300/LB400/LBE300/
LBE400 S11 provide permanent air flow. The KOMFORT EC LB600/LBE600
S11 model has impellers with backward curved blades.
EC motors have the best power consumption to air capacity ratio
and meet the latest demands concerning energy saving and high-efficient
ventilation. EC motors are featured with high performance, low noise level
and totally controllable speed range.
The unit is equipped with a high-efficient counter-flow polystyrene heat
exchanger with a large surface area.
Heat recovery is based on utilization of heat energy contained in the
extract air stream for heating up of supply air stream. Extract air transfers
most of its heat to the intake air flow. Heat recovery reduces heat energy
losses in cold seasons. In summer the heat exchanger performs reverse and
transfers a part of the accumulated coolness from the cooled extract air for
warming up of intake air. This contributes to better performance of the air
conditioner in ventilated premises.
The drain pan under the heat exchanger block is used for condensate
collection and drainage. The drain pan is equipped with a drain pipe for
condensate removal outside the unit. The electronic frost protection system
is used to prevent the heat exchanger freezing in cold seasons.
• KOMFORT EC LBE S11: the bypass damper opens on a signal from
the temperature sensor to let intake air flow bypass the heat exchanger.
The heater warms up the supply air temperature up to the set point.
Synchronously, the heat exchanger surface is warmed up with extract air
flow. After a freezing danger is over the bypass closes and the unit reverts to
the normal operation mode.
• KOMFORT EC LB S11: In case of heat exchanger freezing danger
communicated by the external temperature sensor the supply fan is stopped
to let warm extract air warm up the heat exchanger. After that the supply fan
is turned on and the unit reverts to normal operation.
The KOMFORT EC LBE S11 unit is equipped with an electric heater for
operation during cold seasons at low outside temperature. The integrated
electric heater is activated to warm up supply air flow if set indoor air
temperature may not be reached by means of heat recovery only.
The smooth heat output control ensures automatic supply air
temperature maintaining.
Two integrated protection thermostats, one actuated at
+60 °C with automatic restart and the other one actuated at +90 °C with
manual restart are used for overheating protection.
The built-in G4 pocket supply filter and G4 cassette extract filter
provide efficient air filtration. Optionally, a F7 supply filter may be used.
Control unit
Supply fan
Electric heater
Drain pan
Extract fan
Drain pipe
Extract filter
Supply filter
Heat exchanger
Bypass damper
EXTRACT AIR
SUPPLY AIR
INTAKE AIR
EXHAUST AIR
Duct humidity sensor FS1
(available as a specially ordered accessory)
Duct temperature sensor
TE5 (available as a specially
ordered accessory)
Temperature sensor downstream
of the heat exchanger TE2
KOMFORT_EC_LBE_v1(3)_EN.indd 4
11.08.2015 9:01:18
